Extras

10 Modern Marvels That Changed America
A whirlwind tour of 10 engineering feats that made our civilization possible.
10 Modern Marvels That Changed America

The Eads Bridge Proved the Power of Steel
The Eads Bridge proved that steel could be used for large-scale building projects.
The Eads Bridge Proved the Power of Steel

Episode 3 Preview | 10 Modern Marvels That Changed America
A whirlwind tour of 10 engineering feats that made our civilization possible.
Episode 3 Preview | 10 Modern Marvels That Changed America

Extended Trailer | Modern Marvels
A whirlwind tour of 10 engineering feats that made our civilization possible.
Extended Trailer | Modern Marvels

Web Extra: A Modern Ride on the Transcontinental Railroad
Amtrak still operates trains over portions of the original Transcontinental Railroad.
Web Extra: A Modern Ride on the Transcontinental Railroad

Web Extra: A View from the Top of the Roebling Bridge
Geoffrey goes to the top of the Roebling Bridge to learn about its engineering feats.
Web Extra: A View from the Top of the Roebling Bridge

Web Extra: The Current State of the Interstate
The once futuristic Interstate Highway System is now in need of repair.
Web Extra: The Current State of the Interstate

Web Extra: When Mules Ruled the Canal
The role played by mules that pulled barges along the Erie Canal in its early days.